Category Archives: Array

589. N-ary Tree Preorder Traversal | N-ary Tree Preorder Traversal LeetCode Solution in Java

N-ary trees, also known as k-ary trees, are tree data structures where each node can have up to ‘n’ children. They are a generalization of binary trees and are used in various applications, including file systems and hierarchical data representations. In this comprehensive blog post, we will explore the concept of N-ary trees, discuss the… Read More »

590. N-ary Tree Post order Traversal | n Array Tree Post Order Traversal LeetCode Solution in Java

Introduction : N-ary trees are a type of tree data structure in which each node can have multiple children, as opposed to binary trees where each node has at most two children. Traversing an N-ary tree can be a bit more challenging than a binary tree, but fear not! In this blog post, we will… Read More »

Two Sum II – Input Array Is Sorted | Two Sum II – Input Array Is Sorted LeetCode Solution in Java

Introduction LeetCode is a popular platform for practicing coding and algorithmic problems. One such problem is “Two Sum II – Input Array Is Sorted,” which is a great exercise for enhancing your problem-solving skills. In this blog post, we will explore this problem, understand its requirements, and implement a solution in Java. Problem Statement Given… Read More »

Solving Arithmetic Progression Problem | Step-by-Step Guide and Examples

Imagine you have a sequence of numbers where each number is obtained by adding the same fixed amount to the previous number. This type of sequence is called an “Arithmetic Progression” (AP). Solving Arithmetic Progression Problem is like climbing stairs where you take the same number of steps each time to go up. Now, let’s… Read More »

Count Inversions in an Array | Coding Interview Question | Count Inversions Merge Sort

Introduction:In the realm of computer science and algorithms, various problems require creative solutions to optimize performance and find meaningful patterns. One such intriguing problem is counting inversions in an array. In this article, we’ll delve into what Count Inversions in an Array are, why they matter, and how to efficiently count them in an array.… Read More »

Equilibrium Index of an Array Problem | LeetCode Solution in Java

Imagine you have a line of people standing on a seesaw. Each person is holding a bag of weight in their hands. The seesaw is like an array of numbers, and each person’s weight is represented by a number in the array. (Equilibrium Index of an Array Problem) The Equilibrium Index is like a special… Read More »

Reverse An Array | Program to Reverse an Array

Imagine you have a row of boxes, each containing something special. Let’s say you have 5 boxes, and inside each box is a different colored ball – red, blue, green, yellow, and orange. This row of boxes represents an array. Now, reversing the array means changing the order of the boxes. Instead of having the… Read More »

Subarray Sum Equals K | Leet Code Subarray Sum Equals K

“Subarray Sum Equals K” is a problem often encountered in computer programming and deals with arrays, which are simply lists of numbers. This problem is about finding how many subarrays (contiguous portions of the array) have a sum equal to a specific target number, K. Let’s break it down with an example: Problem: Given an… Read More »

Subarray with Given Sum | Sliding Window Technique

A subarray with a given sum is a common problem in computer science and programming, often encountered in the context of algorithmic interviews and competitive programming. The problem statement usually goes like this: Problem Statement:Given an array of integers and a target sum, find a contiguous subarray (a subarray with consecutive elements) within the array… Read More »